Sienna sees a straight lane

The fabric underneath me was textured, patterned with geometric grids resembling mapped lanes. A slight warmth settled into my axles. Carefully, I tested my front wheels, turning them slightly to calibrate alignment. With a deliberate, measured roll forward, I followed the printed white-and-dark grid line across the cloth. Ahead, a curved orange-and-black strap rested in my path. I rolled to a calm, complete halt just inches before touching the edge. The path was clear, steady, and under my own control.